The phrase 'curtail freedom' is correct and usable in written English.
You could use the phrase when you want to express the idea of limiting or reducing someone's freedom. For example, "The government has imposed new restrictions on businesses in order to curtail freedom of speech."
Nobody is trying to curtail freedom of expression here.
The crackdown suggests that hard-liners are determined to curtail freedom on cyberspace.
With just one law, the Italian government will curtail freedom of information and prosecutors' duties to investigate.
Laws currently in parliament include anti-terror legislation that critics say will curtail freedom of movement and expression.
The green agenda is seen as yet another way for the state to curtail freedom of action and thought.
As the "limited number" of circumstances for restriction identified in that Article recognised "any attempt to curtail freedom of expression must be approached with circumspection".
They reiterated demands made by the Muslim Brotherhood that President Hosni Mubarak abolish the emergency laws, which curtail freedoms and prevent free elections.
This week's Amnesty International report also found the government continued to "curtail freedoms of expression, association and assembly" and that security forces in the country used "excessive force to disperse protests" killing at least two people.
Local studios that had cut back their spending in 1997 out of fear that China might curtail freedoms relaxed after it became clear that Beijing did not plan to meddle in the territory.
And there is worry Trump will use the industry's most sophisticated tools to curtail freedoms and target opponents.
The Labour Party's Fernando Cheung Chiu-hung said respect for the anthem could "only be earned from citizens, not coerced through a bill which would curtail freedoms".
